Question

13. Express electric energy in terms of power and calculation for electric bill.
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Answer 1

Answer:

Expalined

Explanation:

electrical energy is equals to voltage × current by time

Answer 2

Answer:

Explanation:

The rate at which electrical energy is transferred by an electric circuit is called is called electrical power. Its SI unit is Watt. One watt is equal to one joule per second.  

$P= W/t$

$W=E=P*t$

E=watt-s

1 watt-s =1 joule

Electricity is mostly produced by generators but it can also be supplied by the electric batteries.  

Electricity bill is easy to calculate.  

Multiply the wattage of your device with the numbers of hours the appliance is used .  

Divide it by 1000 and multiply with the rate of one kWh of electricity.

$1\text{ kwh}= 3.6\times10^{6}$ Joule for electric bill

1 kwh=1 unit